package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import kotlin.contracts.SimpleEffect;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {

    @Autowired
    private MinioClient minioClient;
    @Autowired
    private MinioProperties minioProperties;

    @Override
    public String upload(MultipartFile file) {
        try {
            createBucket();

            String datePath = new SimpleDateFormat("/yyyy/MM/dd/").format(new Date());
            String uuidName = UUID.randomUUID().toString() +"-"+file.getOriginalFilename();
            String path = datePath + uuidName;


            PutObjectArgs putObjectArgs = PutObjectArgs.builder()
                    .bucket(minioProperties.getBucketName())
                    .object(path)
                    .contentType(file.getContentType())
                    .stream(file.getInputStream(), file.getSize(),-1).build();
            minioClient.putObject(putObjectArgs);

            String url = minioProperties.getEndpoint() +"/" + minioProperties.getBucketName() + path;
            return url;
        }catch (Exception e){
            e.printStackTrace();
            //throw new RuntimeException(e);
            throw new LeaseException(ResultCodeEnum.SERVICE_ERROR);
        }
    }

    public void createBucket() throws Exception {
        BucketExistsArgs bucketExistsArgs =
                BucketExistsArgs.builder().bucket(minioProperties.getBucketName()).build();
        boolean flag = minioClient.bucketExists(bucketExistsArgs);

        if(!flag){
            MakeBucketArgs makeBucketArgs = MakeBucketArgs.builder()
                    .bucket(minioProperties.getBucketName()).build();
            minioClient.makeBucket(makeBucketArgs);


            SetBucketPolicyArgs setBucketPolicyArgs =
                    SetBucketPolicyArgs.builder()
                            .bucket(minioProperties.getBucketName())
                            .config(getConfig()).build();
            minioClient.setBucketPolicy(setBucketPolicyArgs);
        }
    }

    public String getConfig(){
        return
                """
                {
                  "Statement" : [ {
                    "Action" : "s3:GetObject",
                    "Effect" : "Allow",
                    "Principal" : "*",
                    "Resource" : "arn:aws:s3:::%s/*"
                  } ],
                  "Version" : "2012-10-17"
                }
            """.formatted(minioProperties.getBucketName());
    }
}
